Month Percent 2012-01-01 43.4 2012-02-01 43.7 2012-03-01 44.8 2012-04-01 44.1 2012-05-01 43.9 2012-06-01 43.2 2012-07-01 46.9 2012-08-01 44.9 2012-09-01 45.1 2012-10-01 43.9 2012-11-01 44.7 2012-12-01 45.8 2013-01-01 44.4 2013-02-01 46.1 2013-03-01 45.8 2013-04-01 44.6 2013-05-01 45.3 2013-06-01 45 2013-07-01 45.6 2013-08-01 47.7 2013-09-01 45.7 2013-10-01 45.5 2013-11-01 45.6 2013-12-01 46.7 2014-01-01 44.8 2014-02-01 44 2014-03-01 44.8 2014-04-01 45.3 2014-05-01 44 2014-06-01 46.5 2014-07-01 46.9 2014-08-01 47.2 2014-09-01 45.9 2014-10-01 46.5 2014-11-01 45.7 2014-12-01 46.9 2015-01-01 45.1 2015-02-01 44.9 2015-03-01 43.4 2015-04-01 45.0 2015-05-01 44.7 2015-06-01 44.3 2015-07-01 48.1 2015-08-01 48.3 2015-09-01 45.4 2015-10-01 45.9 2015-11-01 45.3 2015-12-01 44.9 2016-01-01 44.6 2016-02-01 43.0 2016-03-01 45.0 2016-04-01 45.0 2016-05-01 45.0 2016-06-01 44.9 2016-07-01 46.0 2016-08-01 45.8 2016-09-01 45.4 2016-10-01 44.3 2016-11-01 44.9 2016-12-01 45.3 2017-01-01 45.2 2017-02-01 43.2 2017-03-01 44.0 2017-04-01 44.7 2017-05-01 45.2 2017-06-01 46.8 2017-07-01 47.1 2017-08-01 47.3 2017-09-01 46.9 2017-10-01 44.5 2017-11-01 43.4 2017-12-01 45.0 2018-01-01 43.3 2018-02-01 44.0 2018-03-01 43.4 2018-04-01 42.1 2018-05-01 43.6 2018-06-01 43.1 2018-07-01 43.5 2018-08-01 45.2 2018-09-01 43.9